b.setContentModel(bounded(choice().add(a).add(b).add(PCDATA)));
// a can contain any amount of b or PCDATA but excludes itself from
// all nested elements.
CompositeModel a_content = choice().add(b).add(PCDATA);
a_content.exclude(choice().add(a));
a.setContentModel(bounded(a_content));
}
}
public void testExclusionOk()